@misc{indiciaea080cf8fb5b7,
  title = {Geologic map of the Ketchikan and Prince Rupert quadrangles, Alaska},
  author = {Henry C. Berg and Raymond L. Elliott and James G. Smith and R. D. Koch},
  year = {1978},
  doi = {10.3133/ofr7873a},
  url = {https://pubs.usgs.gov/publication/ofr7873A},
  note = {Source identifier: ofr7873A}
}